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High-Speed Differential Signal Connectors

EXT Series

NEW

2001.6

sFeatures

The construction supports high-speed differential signals

such as LVDS, IEEE 1394, and USB 2.0. Use of twisted pair

cable or twinax cable permits transmission speeds up to

several hundred Mbps and higher per twisted pair.

(A) Impedance Matching

The connector is designed to minimize reflections with a

differential impedance of 100 ohms between adjacent contacts.

(B) Low Skew Construction

An equivalent electrical length is maintained between

adjacent contacts while the equivalent electrical length

between opposing terminals is approximately zero.

Consequently the skew within differential pairs as well as

between differential pairs is approximately zero.

However, a low skew between differential pairs is permitted

by going through another layer of the board.

(C) Low Crosstalk

The design features a staggered arrangement between

opposing contacts for low crosstalk effects between opposing

pairs even though these are low-profile connectors.

Soldered wiring has been used as the wiring method for the

plug side composite cable, thin cable, and drain wires;

however, paste soldering permits the batch wiring of

prepared cables. (Existing soldering methods can also be

used to wire the connectors.)

The wiring portion of the plug side is secured by the

molding which prevents short circuits without the use of

shrink tubing. Since shrink tubing is not used, this

allows the twist back length of the twisted pair cable or

the twinax cable to be shortened, thereby permitting the

impedance of the wiring section to be kept in check.

The 65 position connector is designed with 59 signal contacts and 6 power contacts. Each power contact is

rated for 2 Amps. The 71 position connector is supplied with signal contacts only.

With the trend toward lower profiles, the receptacle is made to drop into the board, which results in a height

dimension, including the board, of 5.6mm.

Differential impedance

between adjacent

contacts is 100 ohms

Adjacent contacts

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1 Gbps Eye Pattern Waveform

(One End of Connector: 2 m of AWG #28 Twinax Cable)